98 U. S. BUREAU OF FISHERIES 
the spawning grounds farthest removed from the entrances to the 
Strait, while those entering during the latter part of the season are 
bound for spawning grounds just beyond the entrances. 
The native and exotic distribution of the Pacific salmon has been 
investigated during the past year and a complete report is being writ- 
ten. This study was originally confined to the pink salmon, but was 
later extended to include all species of Pacific salmon. Information 
has been received from virtually every State and country receiving 
shipments of eggs from 1873 to the present date. The success or fail- 
ure of plantings to develop sea-run populations is known and charts 
of the world have been prepared to indicate the range of the native 
distribution, the foreign localities where the transplants have been 
successful, and the localities where transplants have failed. Included 
with this information are data on currents, temperatures, and salini- 
ties of the oceans throughout the distributions. Each factor in the 
native habitat has been compared with those existing in the exotic 
habitat. It appears that where conditions similar to those found in 
the native distribution prevail in the exotic distribution, the plantings 
have usually been successful, but where dissimilar conditions are 
encountered, the introduction has failed. Hence, in all future dis- 
tribution of eggs or fry to new environments, the environmental 
factors in the new habitat should be similar to those within the native 
range. 
ALASKA SALMON STATISTICS 
The collection, tabulation, and statistical analysis of all catch statis- 
tics of the Alaska salmon fisheries was originated in 1935 and con- 
tinued in 1936 through a cooperative arrangement between the 
Alaska Division, the Division of Scientific Inquiry, and the Division 
of Fishery Industries. Its purposes are several: First, to collect all 
available records of the daily catch of salmon in Alaska from each 
form of gear; second, to add to those early records the current data 
as they become available each year; third, to index and segregate 
these data by area, species, and type of gear; fourth, to tabulate these 
data into form for statistical analysis for the study of specific prob- 
lems. L. S. Christey conducted these activities. 
The investigation was continued during 1936 along lines similar 
to those followed in 1985 and described in Progress in Biological 
Inquiries, 1935. The current year’s data were collected and are in 
the process of tabulation. The chum-salmon data for all years in 
southeastern Alaska have been collected. The canvass for records of 
the Prince William Sound area has been completed, and the data 
tabulated for two species, the pink and chum salmon. The catch 
records collected from this district cover only the years from 1917 
to date. While there are on hand some records for Cook Inlet cover- 
ing the period from 1912 to date, a more complete canvass of this 
area is being made. In addition to the above material, some records 
have been acquired from other districts. As yet, however, time limita- 
tions have precluded a complete systematic survey of these areas. 
Plans for the future call for the extension of the survey to the re- 
maining areas, the continued collection of current records, and the 
completion of the. tabulation. It should be emphasized that the 
collection of these data is of paramount importance not only because 
of its present value, but because every year sees more of the early 
